APA

McCONNELL C. R., . (1987). ECONOMICS: PRINCIPLES, PROBLEMS, AND POLICIES. NEW YORK: MCGRAW-HILL.

Chicago

McCONNELL CAMPBELL R, . 1987. ECONOMICS: PRINCIPLES, PROBLEMS, AND POLICIES. NEW YORK: MCGRAW-HILL.

Harvard

McCONNELL C. R., . (1987). ECONOMICS: PRINCIPLES, PROBLEMS, AND POLICIES. NEW YORK: MCGRAW-HILL.

MLA

McCONNELL CAMPBELL R, . ECONOMICS: PRINCIPLES, PROBLEMS, AND POLICIES. NEW YORK: MCGRAW-HILL. 1987.